Question

An ionic crystal lattice has r+r- radius ratio of o.320 its co- ordination number is

Answer 1

here you go 0.320 lies b/w 0.225 and 0.414 so coordination number is 4 and you can know it's shape by its hybridization whether it is tetrahedral or square planar ,that is if hybridization is sp3 then it is tetrahedral and if dsp2 it is square planar. hope you find it useful